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Statistics

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A class has 3 sections. Here is a summary of the scores on the final exam.

Average SD Number of Students
Section 1 68 9 20
Section 2 75 9 25
Section 3 60 9 32

Find the average score of all the students in the class.

  • Statistics - ,

    Mean = ∑x/n --> n(mean) = ∑x

    (68*20) + (75*25) + (60*32) = ?

    Divide that by 20 + 25 + 32 = ?

  • Statistics - ,

    Thanks I got it

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